All nine people are now in police custody at various police stations across the north west of England, where they will be questioned on suspicion of conspiracy to supply Class A and B drugs, police said.

Detective Inspector Graeme Lindsay, of Police Scotland's Organised Crime and Counter Terrorism Unit, said: "We are delighted to have worked jointly with Titan on today's operation. Tackling organised crime is a very high priority for Police Scotland, and I hope today's operation sends yet another warning signal to those involved in it that we will do everything we can to continue to identify them and deal with them appropriately.

"Our partnership with organisations such as Titan seeks to strengthen our capability to tackle such crime, share intelligence and assist in operations like the one today. We will continue to relentlessly pursue individuals involved in organised crime."

The three men arrested in Glasgow are aged 27, 29 and 53.

The two women arrested in England are aged 31 and 35, the two men arrested in prison are 38 and 43, and the other two men are 32 and 35.